[PSObject].PSAddMember method

    Update-TypeData -Force -TypeName System.Object -MemberType ScriptMethod -MemberName PSAddMember -Value {
        switch ($args.count) {
            1   {
                $hash = $args[0] -as [HashTable]
                Add-Member -InputObject $this -NotePropertyMembers $hash -Force
                break
            }
            2   {
                $name, $value = $args
                Add-Member -InputObject $this -NotePropertyName $name -NotePropertyValue $value -Force
                break
            }
            3   {
                $name, $value, $MemberType = $args
                Add-Member -InputObject $this -Name $name -value $value -MemberType $MemberType -Force
                break
            }
            default {
                throw ('Cannot find an overload for "{0}" and the argument count: "{1}".' -f 'PSAddMember', $args.Count)
            }
        }
    }